Blade construction



Dec. 11, 1928.

J. DAW

BLADE CONSTRUCTION Filed May 18, 1927 2 Sheets-Sheet Dec. 11, 1928.

J. DAW

BLADE CONSTRUCTION Filed May 18, 1927 2 Sheets-Sheet 2 Patented Dec. ll, 1928.

hearse srarrarer err JOSEPH DAW, 0F QUEBEC, QUEBEC, CANADA, ASSIGNOR TO BROWN COMPANY, OF

BERLIN, NEW HAMPSHIRE, A CORPORATION OF MAINE.

BLADE CONSTRUCTION.

Application filed May 18,

This invention relates to blade construction in the so-called orange peel bucket which is employed for excavating, handling materials, and like work, and has among its objects to provide a construction which will withstand severe usage and which will give maximum bucket capacity.

One feature of the blade construction of the present invention lies in its reinforcing members, which are arranged to take stresses of the severest kind and to prevent failure of the blade as by buckling. Another feature of the blade construction is that its supporting arms are arranged above its upper edge, thus adding to the capacity of the bucket and preventing interference by the material in the bucket with the operation of the arm to open or close the bucket.

With these and other features and objects in view, the invention consists in the following construction, arrangement, and combination of parts, which will hereinafter be described in conjunction with the accompanying drawings, wherein I Figure 1 represents in plan view a blade constructed in accordance with the present invention.

Figure 2 represents a front view of the same.

Figure 3 shows a detail view of the external toe portion of the blade.

Figure 4 is a section on the line 44 of Figure 1.

Figure 5 is a section on the line 55 of Figure 4.

Referring to the drawings, 1 indicates as a whole the orange peel blade which is shaped generally in the form of a triangular, spherical sector. The blade may be made of steel plate which is so thin as to be incapable of itself of withstanding the severe impacts to which the blade is sometimes subjected. Hence I provide it with reinforcing members so arranged as to take the stresses of impact, these members preferably being both welded and riveted to the plate so as to ensure their permanent fixture.

As best shown in Figure 2, a pair of angles 2 having tapered outwardly facing flanges are fixed to the plate centrally thereof, both extending from the toe portion of the blade, where the stresses of impact are most likely to cause the plate to buckle, gradually diverging somewhat toward the upper edge of the blade, and then being extended in substantial-= suit the outer ends of a 1927. Serial No. 192,265.

ly parallel relation above this edge to perpair of supporting arms 3 to be fixed'thereto. Preferably, the toe portion of the blade is further reinforced with an internal toe piece 5. i

To prevent adjacent blades of a bucket from overlapping, as well as to strengthen their side edge portions, I provide angles 4 at their side edges, each of these extending from the toe portion of the blade to its upper edge. I preferably also provide the blade at its upper corners with lugs 6 at an angle with the upper edge ofthe blade and projectmg inwardly of the blade,'these serving ad ditionally to prevent overlapping of adjacent blades.

The upper edge portion of the blade is turned inwardly at 7, being provided with a central portion 7 projecting further inwardly than the remainderto afford ample support for an inwardly extending gusset plate 8, which, in turn, serves as a sturdy support or base for the arms 3 which are secured thereto. As shown, this gusset plate is fashioned to reinforce internally the lugs 6. The arms 3 preferably constitute the side walls of a channel member, the outer end portions of these walls being fixed to the angles 2, and the base of the channel being fixed to both the gusset plate and portion 7. The arms thus fixed in position above the upper edge of the blade do not reduce the bucket capacity and are not interfered with in operation by material in the bucket. The arms are preferably strengthened by separators, such as the pipe separators 12 shown fixed therebetw'een. The bearing surface at the outer and inner pivotal openings 10 and 11, respectively, through the arms is preferably extended as by welding outer and inner collars 9 and 9 respectively, on the arms in line with the openmgs. As shown, the outer collars 9 are welded on the outer surfaces of the arms and the innercollars 9 on its inner surface. e

A blade constructed as described withstands severe use eifectively, as the rcinforc ing members are quite capable of taking the stress. Thus, when the toe is brought down forcibly against hard material, the greater portion of the stress is taken by the angles 2 and 4, and not by the plate, which merely servesto support material in the bucket. The blade, therefore, may be made of relatively light weight plate and accordingly the bucket as a whole may be of low overall weight, In

loo

fact, where the mate 'ial being handled permits the plate may be perforated to lighten the blade further. I

Having thus described an embodiment of this invention it should be obvious that it is capable of modification without, however, departing from its spirit or scope as defined by the appended claims.

What I claim is:

1. In combination, a blade shaped generally in the-form of a triangular sphericalsector, a reinforcing member extending centrally o1"; the blade from its toe portion to a point above its upper edge, a support extending inwardly at the upper edge ofsaid blade, and a supporting arm whoseouter'eud portion is fixed to said support'and to said membeirabove said l g8.=

2.4 In coinbinatiom a blade shaped generally the formof a triangular spherical sector; a :pairof angles extending centrally of the blade; both extending from its toe portion, gradually-diverging toward its. upper edge and extending in substantially parallel relat-io'n above said edge; and a channel member whose outer end is received between and fixed to said angles above said edge. V

3. In combination, a blade-sh aped generally in the form of a triangular spherical sector whose upper edge is turned inwardly and is provided with a central portion projectingv further inwardly than the remainder; an inwardly-extending gusset plate fixed to said inwardly turned upper edge and to said portion'; a pair ofangles extending centrally of theblade from its toe, gradually diverging toward its upper edgeand extending-in sub.- stantially parallel relation beyond said edge; and a channel member whose base is iixedi to said gusset and whose sidewallsare received between and fixed to, said angles above said edge;

In testimony whereof I have affixed my signature.

JOSEPH 

